Hello. No advice on changing tank water today. I'm doing 50 percent water changes this week on 12 fish tanks that range in size from 45 gallons to 300 gallons. I manage a tank for a local government business and take care of some Koi for a local botanical gardens. They like to bring their Koi to my place over the Winter months because my 300 gallon is heated. I put them in with my Goldfish. My Goldfish are nearly as large as their Koi. The fish get along very well and Koi are interesting fish. I keep three gold and one yellow Koi.
10 Tanks (Now more)
10 Tanks (Now more)